in it's a region with deep ties to extremism. authorities areinvestigatingtamerlan's tripto russia and his posting of videos on the internet when he came back. john bolton, former ambassador to the united nations joinses as he does every sunday. good morning, ambassador. >> good morning, eric. glad to be with you. >> the chechnyan terrorists have the blood of hundreds on their hands. are they a threat to us? >> potentially they are. that's an important question for investigators to answer, not because of anything having to do with their desire from chechnyan nndz froneppedzindependence frot because ove many chechnyan actis are radicalized. now their terrorist activities are in places as diverse as throughout the middle east and afghanisn, having nothing to do with russia about having to do with islamic extremism. that's a working hypothesis, something we ought to be investigating. >> there are reports that the chechnyn rebels are denying any link with the brothers, saying their war is with russia, not the u.s. how does that play out if this is indeed the case? >> there are two moti